Once there was a scholar who was reading in the upper story of his house. It was a rainy, cloudy day and the weather was gloomy. Suddenly he saw a little thing which shone like a fire-fly. It crawled upon the table, and wherever it went it left traces of burns, curved like the tracks of a rainworm. Gradually it wound itself about the scholar's book and the book, too, grew black. Then it occurred to him that it might be a dragon. So he carried it out of doors on the book. There he stood for quite some time; but it sat uncurled, without moving in the least.